Culvert.



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;sT- ES P TEN OFFICE.

;Terms H. manu, roANToN, onto, ASSIGNOB. *ro THE cAN'roN cUnvERT company, .oncnv'rom' amo, A CORPORATION or omo.

CULVERT.

To all wh om it may concern: l p

Be it known that 'I, JULIUS H. SCHLAFLY,

' a citizen of the United 'States, roiding at the Sections of the culvert connecte'd toget-her and illstrating--a section in position to' be connected. Fig. 2 is a viewof a culvert section before th e lapped edges are connected together to produce a' closed .cylindrical section. r

The present invention has relation to the peculiar manner of for'ming sewer pipeor culvert Sections,` and connecting their lapped edges together. The purposes of the invention are to provide a simple means whereby any desired number of Sewer pi'pe sections can be connected together; Similar numerals of reference indicat drawing.

In the accompanying drawing, 1 repre corresponding parts in allthe figures ofthe' sents *the culvert Sections, which may 'be' otany' desired length referencebeing had" to convenience in manufacture, which. sec-` tions are corrugated transversely.:` The lapped edges of the culvert Sections are'so,

connected that' the corrugati'ons produce screw threads or in other 'words the eor-` rugations are located at anangle to a line drawn at right angles diametricallythrough the culvert Sections, which'is', produced by rivetng the second corr'' ion from one V end of the section to the' first corrugation A of thesame end -as illustfated at 2,-Fig. 1,

` whereby the corrugation are arranged that the culvert Sections can be connected together in the `same 'n'anner as ordinary. screw threaded ppes are connected together.

It will be understood that extendin'g the corrugations at the opposite 'endsof the culvert Sections beyond the -lap ed portion ,,of the culvert section any desire number of V Sections 'ca-n be connected together by a rotai-y; movement of one section 'against an opposite or connected section held against rotatioIL It willalso be understood that the Specification of Letters Patent. V

.by Letters Patent, is-'- Patented Mar. 11, 19 13 Application filed April 29, 1908. Scrial No. 429,847.

diz'meters of the various Sections can be adjuted sufliciently to allow for ,one culvert section to enter an adj'acent section simply by increasing the- Width of the lap at the end of the section designed to be entered into an adjcent section.- This adjustment can -be brought about. by changing the. position of the rvet aperturesB wth reference to the* edges of the culvert Sections 1.

It will be understood that the culvert sections can be easily produced, owing to the fact that the Sheets While inaplain or unrolled Condition can 'be corrugated the corrugations running parallel 'with the ends of the rectangular, Sheets and by staggerin'g the corrugation at the lapped edges they are brought at an angle to a right 'angle transverse of the section, whereby any de sired number of culvertsections can 'easily connected together. It will also be understood that by askewing the body of the culvert section helical ends are produced,

and the corrugations run parallel' wit-h thehelical ends of the culvert section. Having fully described my invention what I Claim' as new and desire'to se'cure 1.' 'As an improved 'article of 'manufacture, a metal culvert section' formedfron a 'rectangular corrugated Sheet, the -'Sheet bent into' cylindrical form and the corrugations 'of the lapped edges' staggered, whereby the eorrugations are brought at an angleto a plane transverse of the pipe.

2. A sheeLmetal* culvert section formed from a rectangular Sheet of netal, said Sheet ;provided with a series-oi corrugations running from edge to ed ge, saidcorrugations being parallel with each other and with the end edges' of said sheet, said oorrugated .Sheet bent into tubularform with the corrugations running around said section, and the edges lapped and'fastenedto each other, the first corrugations of one edge located over the second' corrugation of the other edge.

" 3. A metallic eonduit section formed from a rectangular corrugated blank, the corru-` gations extending trans'versely in parallel- -sm with the blank' ends, and the series lonitudinally throughout the entire Sheet, the lank being bent into tubular form alon 'lines tr'ansverse' to the corrugations, an

the meetingedges skewed'substantially the distance of one corrugation, formi'ng a single spiral convolution extending throughout the section.

4. The herein described method of making metal culverts consisting in rolling a previously corrugated Sheet, of metal longitudinally of the corrugations to form a cylindrical body, overlapping the edges of the Sheets at the ends of the corrugations, springing the overlapped edges laterally of the corrugations to form spiral screW threads, and securing the overlapped edges together.

. 5. The herein described method of making metal culverts" consisting in rolling a previously corrugated rectangular shet of metal longitudinally of 'the .corrugations to form a cylndrica'l body overlappingtheedges of the Sheet atthelnds of, the corugations, springing the overlapped edgesel'aterally of the corrugations to ,form spiral screw threads 'gnd projecting guiding portions at the "Lends of the'culvert, and securing the "overlapped of' the sheet metal together.

6. A 'cul ve't-section consisti'ng of a corru gated sheet rolledllongitudinally of the corrugations and having overlapped edges secured together, the overlapped portions' being .sprunglaterally' of the corrugations to arrange 'the same spirally to form screw threads, and a seam for-med by the overlapped edges being-disposed spirally in a direction opposite the corrugations.

7. The method of making corrugated culvert sections which consists in taking a blank corrugating and bending 'the same;

into cylindrical formand then moving one longitudinal edge of the blank relatively to the other in the direction of the length of rigidly secure said longitudinal edges in overlapped relation.

.and then .fastenin 9. The herein described method of form ing a corrugated Sheet metal pi e which con'sists of taking a flat corrugate Sheet of metal and forming it cylindrcal and forcing-each side'f the pipe in opposite directi-ons to stagger the corrugaton and then riveting them together whereby .a spiral is formed. f a v' 10. In acorrugated pipe,` the herein .de

scribed .method which con'si'sts in formng flat sheetspf corrugated steel into a'. c ylindrical formand 'the-n forcing the -corrug'a tion in staggered relation with reference a thread or spiral. s formed which is adapted to be connected'toa Similar pipe- 11. A culvert formed ,from'a'sheetmetal 'blank having corrugations arrjanged parallel with opposite edges of said blan ,said corrugations assuming a spiral formationdue to the -twistingofthe sheetmetal blank..

12. An improved culvert, comprising a -to each other with. ,thef edges overlapping them together, whereby Sheet metal body portion provided with cor--. rugations throughout its length. arranged* parallel With opposite, edgesthereof, the

longitudinal edges 'of said eulvert being in overlapped position for a gortioi .only of' U their length, whereby the corrugations in said body,portion.assnme afspiral forma tion. v

13. The method of form-ing. a spirally corrugated culvert' section, which consists ,n rolling into tubul'ar -formv a blank having corrugations arrangedrpara llel with the oppositetransverseedges thereof, and twisting said blank i'n a longitidinal direction so' that the corrugations' in. the completed culvert section assume a spiral formaton. 14. The method o f formi'g a spirjallyflcor rugated culvert section, which consists in rolling into tub lar form a .blank hav' corrugations arranged pai'allel'withthe op posite transverse edges thereof, overlappin the longitudinal edges of -said-blank, an

twisting said blank so that the .longitudi-, nal edges overlap only for' a portion of.

their length, whereby thecorrggations sin said `blank assume a-spiral jrmaton;

In 'testimony .that 'I laim the abovefT have hereun to s bscribed my name in presence of'two mtnesses;

JULIUS H. SCHLAELY. Witnesses:` V E. C. LAUGENBACH, PERRY' MJ HORNE.

Copes of this patent may be obtaned for five cents each, by adressng the Washington, D. C."

'fCom nissioner of Patents, 

